[COMMITTED] benchtests: Fix bench-build after cd748a63ab

[Adhemerval Zanella]

The benchtests does not define _LIBC.
---
 benchtests/bench-memccpy.c   | 2 +-
 benchtests/bench-rawmemchr.c | 2 +-
 benchtests/bench-strcoll.c   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/benchtests/bench-memccpy.c b/benchtests/bench-memccpy.c
index ed637e7826..e62935b57c 100644
--- a/benchtests/bench-memccpy.c
+++ b/benchtests/bench-memccpy.c
@@ -23,7 +23,7 @@
 void *
 generic_memccpy (void *dst, const void *src, int c, size_t n)
 {
-  void *p = memchr (src, c, n);
+  const void *p = memchr (src, c, n);
 
   if (p != NULL)
     return mempcpy (dst, src, p - src + 1);
diff --git a/benchtests/bench-rawmemchr.c b/benchtests/bench-rawmemchr.c
index a2d95f0e6f..4dec7cf0e4 100644
--- a/benchtests/bench-rawmemchr.c
+++ b/benchtests/bench-rawmemchr.c
@@ -31,7 +31,7 @@ char *
 generic_rawmemchr (const char *s, int c)
 {
   if ((unsigned char) c != 0)
-    return memchr (s, c, PTRDIFF_MAX);
+    return (char*) memchr (s, c, PTRDIFF_MAX);
   return (char *)s + strlen (s);
 }
 
diff --git a/benchtests/bench-strcoll.c b/benchtests/bench-strcoll.c
index b7f2a80c73..d707d1e0be 100644
--- a/benchtests/bench-strcoll.c
+++ b/benchtests/bench-strcoll.c
@@ -245,7 +245,7 @@ main (void)
   result_t result = OK;
   for (i = 0; i < (sizeof (input_files) / sizeof (input_files[0])); i++)
     {
-      char *locale = strchr (input_files[i], '#');
+      const char *locale = strchr (input_files[i], '#');
       if (locale == NULL)
 	{
 	  printf ("Failed to get locale from filename %s, aborting!\n",
-- 
2.43.0